Air-pump and automatic pressure-regulator therefor.



PATENTED AUG. 27, 1907.

G. SCHMIDT. AIR PUMP AND AUTOMATIC PRESSURE REGULATOR THEREFOR.

APPLICATION FILED SEPT.12.,19OG.

2 SHEETS-SHEET l.

W T'ZnwJeJ PATENTED AUG. 27, 1907 V G. SCHMIDT. AIR PUMP AND AUTOMATIC PRESSURE REGULATOR THEREFOR.

APPLIOATION FILED SEPT. 12, 1906 '2 SEEMS-SHEET 2 Q ceases cillated. The circuit-controlling lever 12 is also fulcrumed on the pivot 7, and has mounted on one end thereof a contact 13 which is adapted to engage a cooperating contact 14 secured to the plate 6. The contact 13 isadjustably mounted in a sleeve on the end of the lever 12, while the contact 14 is secured in a like manner in a sleeve 15 secured to the plate 6. Connected with the lever 12 and the sleeve 15 are wires 12 and 15, forming art of an electric circuit, not shown, which operates the motor. When the contacts 13 and 14 are engaged, the circuit will be closed and the motor will be operated. On the pivot 7 is also loosely mount- .ed a segmcnt-shaped plate 16, carrying on its lower end a tail piece 17. On the end of this tail piece is located a pin 18. At S some distance from the pivot 7 is tulcrumed a lever 20 having a long and a-short arm, and in, the outer end of the short arm is located a slot 19, in which the pin 18 is adapted to loosely play. At graduated intervals on the long arm of the lever 20, are notches intoany one of which may be set the hook 21 of the weight 22. By this arrangement the weight 22 may be adjusted on the lever 20 so as to secure the operation of the lever 4 at different pressures, the outer ends ol the lovers 4 and 20 being connected by the rod 23. Near the two straight edges of the front face of the segment 16 are projections 24 which may consist of screws tapped into the plate 16 These projections 24 are adapted to alternately engage the opposite sides of theweighted lever 9 and slriit the same.

in the drawings 1 have shown the two contacts 13 and 14 as being in engagement, and hence the circuit is closed and the pump is operating. When the pressure in the tank 0 reaches a certain pressure as determined by the location of the weight 22 on the lever 20, further operation of the pump will cause the diaphragm 2 to rise, carrying with it the pin 3. This will fo ce upward the outer ends of the levers 4 and 20 to the position shown by dotted lines in the drawing. The

,short arm of the lever 50 will necessarily be lowered by the upward movement or the long arm, and in this down-ward movement of the short arm the tail piece 17, through the pin and slot connection, is forced around to the right, which will cause the .Ieighted lever 9 to move to the left from the position shown in the drawings until it has passed the vertical line, when turthcr movement in that direction is accentuated by gravity acting on the weight 10. his movement of the lever 9 to the left will cause the left-hand curved arm 11 to contact with the end of the lever 12 and raise the contact 13 from engagement with the contact 14, and thus the circuit is broken and the pump is stopped. By means 01' this weighted lever and the device operating the same, it will be seen that whenever the prcssure rises above the predetermined point, so as to force the weighted lever 9 beyond the vertical line, there is a quick and positive throw ol' the switch carrying the Contact 13 rapidly away from the contact point 14. When the pressure is reduced the diaphragm 2 falls and the levers 4 and 20 will assume the positions shown in Fig. 3. In assuming this position the lov r 20 will force the weighted lever 9 back across the vertical line, when, by reason o its own weight, it will fall to the right. The righthand lover ll impinging on the circuit-controlling lever will bring the contact 123 into engagement with the contact 14, and thus close the circuit operating the motor. The two curved arms 1% are made somewhat resilient so as to avoid undue shock when they strike the circuit controlling lever-l2.

On the outer end of the pivot 7. is mounted a spring 25 which is held in place by'the nut 8 threaded onto said pivot. The spring 25 bears against the circuit con trolling lever lfZso as to hold the contact 13 firmly.- against the contact 14. This spring serves to hold the lever 12 in both of its shifted positions so that it will not be oscillated by the jarring of the macl'iinery While in motion.

While I have described my apparatus as a device for compressing air, it will be understood that it may be used also for compressing other agents.

I do not restrict my invention to the exact details herein described, as various alterations in the details could be made without departing from the scope of'the invention.

Having thus described my invention, what 1 claim as new and desire to secure by Letters Patent is:

1. In a device oi? .tlie'class described, the combination of a shiftable motor-controlling member, an oscillatory weighted lever to posiiivelyactuate the same at each end, only, or the strokeor' the lever, a pivoted segment having studs to engage and move said lever, said segment also provided with a tailpiece carrying a pin, and a lluid pres sure controlled lever having a slotted engagement with said pin.

2. In a device of the class described, the combination of a sliiftuble motor-controlling member, an oscillatory lever havinga weight movable to opposite sides of a verlical linc extendingthrough the center of motion of the lever, the latter being provided with curved arms adapted to engage the circuit controlling member and move it to different positions, an oscillatory member having projec floss between which the lever is located, and mechanism for one itlng the oscillatory member to cause the pr0jec tlons to alternately engage a fl operate said lever.

3. in a device of the class described, the combination of a shift-able motor-controillng dcvice, an oscillatory lever having a weight, the lever having a movement to (furry its weight to opposite sides of o. vertical line intersecting its center or" movement, said lever being adapted at the end of each of its oscillations only to move the motor-controlling member into its operative and lnopera LlVQ positions respectively, an oscillatory member having projections between which the lever is located, and a pressure operable lever having a slot in engagement witli u pin on said osclllatory member and adapted on its stroke lo move the oscillatory member back and forth to cause the projections thereon to oscillate said lever.

-l. In a device of the class described, the combination of a plvolally mounted circuit controller, a weighted lever supported foroscillation by the pivot of the circuirv on troller, a segment also supported for oscillation by said pivot, the weighted lever serving to engage the circult controller on each side ol' its pivot and move it into its operative and inoperative pos ions, respectively, and the segment se ing to operate the lever, and pr ore-opereel H1021 us for acid: g'rncnt.

'ln ilcvicc of tin c ss described, the combination or a pivolzzlb; mounted circuit controller, a weighted lever supported or oscillation on the pivot of the circuit conrmenr also supported for oscillation on pivot, tllewe' 'hlcd lever ser ing: to engage the circuit controller on e1 ll side of its pivot and move it into its operative and inoperalive positions, respectively, and the segment serving, to operate the lever, pressure operated means for actuatingthe stu'lnklllll, and a spring acting against the circuit controller to hold the same positively irollci', a

- in its shifted positions.

(3. lo a device of the claws described, the combination ol a circuit controller, a we llllfl lever for moving the (ll'lillllf conli-ollmlulu ils opt-r- 'e and inoperative posillons, respectively, an oscillatory member [or actuating Weight.

the lever, and a pressure actuated lever for engaging and shiftin said member and provided with an adjustable 7. In adevice of the class described, the combination of a pivotally mounted circuit controller, a lever supported for oscillation by the pivot of the circuit cont oller and adapted to act against said circuit controller at opposite sides. of its center of motion to move the same into operative and inoperative positions, respectively, a segment supported for oscillation by said pivot and pro, vided with projections between which the lever is located, pressure operated means for actuating the segment to cause the projections to alternately operate the weighted lever, a spring fitted against the circuit controller to hold the some in its shifted positions, said pivot extending through the spring.

8. In a device of the class described, the combination with an electrically operated means for compressing air, a pressure regulating means consisting 0! a fixed pivot, a

circuit'controlling lever mounted to oscillate thereon for opening and closing the circuit operating said motor, a weighted lever carrying side arms for oscillating said circuit controller mounted on said fixed pivot, a segment plate also mounted on said fixed pivot and having projectioni adapted to contact with the opposite sides of said weighted lever to shift the same, a tail piece having a projection on said segment plate, a of its ends and having a looseconnection with-the projection on said tail piece, a weight adjustably mounted on said last-named lever and means operated by the varying pressure created by the compression means for oscillating said last-named lever whereby the mechanism is actuated to open and close the circuit operating the motor.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GOTTFRIED SCHMIDT.

Witnesses:

III-JNRY Znrennn, JosIAn Woomnuo.

lever pivoted near one 

